What I've done:
Car has a NW103 TB, Camshaft: 237/250 .646"/.632" 113LSA, Lingenfelter CNC Heads, MSD Atomic AirForce Intake, and a set of long tubes. 7.0L
*Previous LS7 with the MSD Intake responded perfectly with the plenum volume set to 1000cc, so same has been entered here.
FIC 60lb Injectors Ive checked the data sheet and it looks to me that the previous tuners, yes there have been a few before me on this one, have the scaling correct.
MAF is spot on, within 2% for the entire range of the car. Pulls great, no hick-ups at all, but bucks below 1900RPM.
I have tried locking timing below 2k RPM at 15-17*(Thinking Cam Surge) and only made the situation worse. Put timing back in, smoothed tables, still bucks.
Matched Idle Timing to High and Low Timing and still bucks.
Set RAF to around 13-14g/sec in the main, and then used modifier to add air, still does it.
Thought that tuning the VE Tables may help or rid the car of this issue. Have the fuel just roughed in for VE, only up to 2k RPM... the table is still ugly but the bucking hasn't really changed at all. What I am seeing is the Throttle Body seems to be jumping when this happens. If anybody is willing, have a look at the attached scan and tune. Let me know if something here sticks out to you. I've done many Gen4 modded engines, but this one just wont settle down so I'm here looking for a little help.